Conveyable media — how their condition influences the choice of pump

Whether a pumping medium is solid, liquid or gaseous influences the choice of pump.

Atoms and molecules of recoverable media

In the chemical industry in particular, the extraction requirement is complex Substances very high. pumps must be able to easily transport acids, bases or toxic, corrosive or gaseous solutions. In addition, high temperatures or solids in the medium can influence the pump's performance. When choosing a pump, safe and trouble-free delivery is particularly important.

What conditions can eligible media have?

substances may be solid, liquid or gaseous. This condition is called Aggregate state. The aggregate state depends on temperature and pressure. These aggregate state changes include melting and solidification, boiling and condensation, sublimation and resublimation, but also evaporation and evaporation.

As melting, the process of starting material from solid to liquid aggregate state. Solidification, in contrast, is the process from liquid to solid state. The melting and solidification temperature is always the same. Boiling is the process from liquid to gaseous state and condensation is exactly the opposite. Sublimation involves the transition of a solid substance into a gaseous one. Resublimation describes the change of a gaseous substance to a solid state of matter. Like boiling, evaporation describes the transition of a liquid substance into a gaseous one. However, when evaporating, this happens below the boiling point. Finally, evaporation describes the change from liquid to gaseous aggregate state at boiling point.

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How do the various aggregate states arise?

A solid fabric maintains shape and volume. Solid substances are also called solids. In the case of a liquid medium, on the other hand, the shape is unstable and adapts to its environment. However, the volume is always the same and constant even with liquid media. Such media are also known as liquids. A gaseous substance has neither a constant volume nor a constant shape. As soon as a substance is gaseous, it adapts to the spatial conditions and fills the entire available space. Such substances are called gasses. But how do these various conditions arise?

In chemistry, this situation is explained using the particle model. The particle model states that every substance consists of the smallest particles. These smallest particles are atoms, ions, and molecules. In the case of solid, liquid and gaseous substances, the arrangement and movement of these atoms, ions and molecules is completely different.

If you now look at a solid It can be seen that the smallest inner particles are only moving very slightly. They all have a fixed position and they just swing around it. If you now increase the temperature or allow heat to act on the solid, this fixed arrangement changes. The particles now start to oscillate and rotate, increasing the distance and also the state of aggregation. The particles vibrate around their own axis due to forces that act on all particles. Iron and copper are examples of solids.

An example of forces that can act on ions, atoms and molecules are Van der Waals forces. Van der Waals forces act between the atoms and molecules. It is a rather weak force and the respective atoms and molecules They have to get really close to each other for them to have an effect.

Furthermore, there are electrostatic forces between ions, which originate in static electrical charges. Hydrogen bonds are formed between two molecules, which interact via hydrogen atoms. The so-called covalent bonds are atomic bonds.

In the case of liquids, the particles have no fixed position and move and push each other back and forth. Die viscosity It is much lower here than with solids. When you heat up liquids, the internal movement accelerates. Liquids include water or bromine.

Gases contain particles that move very strongly without being bound to a location. This is due to the high kinetic energy of the smallest particles. Oxygen and helium are examples of gases.

Pumpen für Gase in einer Gasfabrik
pumps for gases

What funding requirements are there?

Substances are promoted in a wide variety of industrial sectors. These industries can be divided into four categories. For example, there is a need for funding in the food industry, who cosmetics industry, who pharmaceutical industry And finally in the chemical industry.

In all industrial sectors, there are either positive displacement pumps or centrifugal pumps for use. Positive displacement pumps use a closed volume inside the pump. Centrifugal pumps, on the other hand, use dynamic forces to pump.

The conditions of the media are always very different from one branch of industry to another.

The food industry promotes food and beverages. This is a very hygienic production process very important. Almost all types of pumps are suitable for pumping liquids. The challenge of the food industry is conveying solids or chunky media. The higher the viscosity, the more powerful suction of the pump is required. Self-priming positive displacement pumps, such as wobble ring pump from pumpsystems. One example of chunky media is, on the one hand, the promotion of soups. On the other hand, examples of the extraction of solids include meat, fruit or even vegetables. Highly viscous dairy products need a suitable pump with a sufficient speed range and a high flow rate.

In industrial companies Cosmetic manufacturing is primarily concerned with high viscosities. Creams and shampoos have a very viscous flow behavior. As a result, our hygienic type of positive displacement pump.

Rotary lobe pumps are valveless and self-priming and therefore enable good cleaning, especially when oils and greasy media are used.

Hygiene probably plays the biggest role in promoting pharmaceuticals. In particular, liquids are transported, such as infusion solutions, suspensions, nutrient solutions, alcoholic solutions and vaccines. In addition to this, there are also highly viscous media, such as blood plasma or ointments, which are pumped. As a result, all types of centrifugal pumps are very popular in the pharmaceutical industry. They are very easy to use and durable housing construction.

In the chemical industry Does the pump come with many chemicals in touch. Typical pumping media are acids, such as hydrofluoric acid or hydrochloric acid, but also hydrocarbons, ammonia or paints and paints. In addition to liquids, there are also chemicals of high viscosity. In the chemical industry, it is particularly important to know the properties of the pump material used. Plastic pumps have proven to be very effective in pumping acids, as have stainless steel, chromium-nickel steel, duplex and titanium. It is important that there is no chemical reaction with the material and chemical used. If surface damage or leaks occur, they provide an ideal habitat for bacteria of all types and contaminate the end product.

Our wobble ring pump easily conveys substances from almost any condition. Feel free to browse through our Product brochure or contact us if you have any questions.

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